Build a Simple Python Web Server With Flask

Flask is a lightweight web application framework for Python. It is easy to use and allows you to quickly build web applications and APIs. In this article, we will walk through the steps to build a simple Python web server with Flask.

Step 1: Install Flask

First, you need to install Flask. You can do this using pip, the Python package manager, by running the following command:

pip install flask

Step 2: Create a Simple Web Server

Once Flask is installed, you can create a simple web server by creating a new Python file and writing the following code:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return "Hello, World!"

if __name__ == '__main__':
    app.run()

This code creates a new Flask application and defines a single route, “/”, that returns the message “Hello, World!” when accessed.

Step 3: Run the Web Server

To run the web server, save the Python file and execute it using the following command in your terminal:

python app.py

This will start the Flask development server, and you can visit your web server by opening your web browser and navigating to “http://127.0.0.1:5000/”.

That’s it! You have now created a simple Python web server using Flask. From here, you can continue to build on this by adding more routes, templates, and functionality to your web application.

Happy coding!